A concrete masonry unit has actual gross dimensions of 7-5/8” x 7-5/8” x 7-5/8”. The unit is tested in a compression machine with the following results:

            Failure load = 98,000 lb

            Net volume = 348.1 in³

1. Is the unit categorized as solid or hollow?
2. Calculate the gross area compressive strength.
3. Calculate the net area compressive strength.

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Describe the similarities and differences between flexural-torsional buckling and

lateral-torsional buckling. What is the coupling mechanism for each of these buckling modes?

What is the manufacturing process of CMUs?

Identify the sustainable development principles applicable to sustainable construction. Explain how construction industry is impacting the environment?

A 100-mL water sample is collected from the activated sludge process of municipal wastewater treatment. The sample is placed in a drying dish (weight = 0.5000 g before the sample is added), and then placed in an oven at 104°C until all the moisture is evaporated. The weight of the dried dish is recorded as 0.5625 g. A similar 100-mL sample is filtered and the 100-mL liquid sample that passes through the filter is collected and placed in another drying dish (weight of dish before sample is added is also 0.5000 g). This sample is dried at 104°C and the dried dish’s weight is recorded as 0.5325 g. Determine the concentration (in mg/L) of:

(a) total solids,

(b) total dissolved solids,

(c) total suspended solids, and

(d) volatile suspended solids, (Assume that VSS = 0.7 x TSS.)

A power plant release a grey smog plume that contains high concentration of sulphur dioxide into the atmosphere around 8am in the morning.

The plume spread out horizontally but do not mix vertically.

From the observation, the plume does not reach the ground level and extend downwind from the source for long-distance.

(a)   Using an illustration, identify the type of plume produced

(b)   Explain the factor that contributes to the formation of this plume?

A cantilever beam AB is 4 m long and is fully restrained at the left support A. The beam is loaded with a uniform load of 600 N/m over a length of 2 m from the free end together with a clockwise couple of magnitude 4800 N-m at the tip B. Determine the maximum moment.

Illustrate your opinion related to the number of subcontracts that are required to construct residential buildings as opposed to the number of subcontracts that are required for heavy construction projects

Derive the different relationships among the properties of the soil.

I have good knowledge but I want to see the derivations at once.

Note: Please don't write the names of the properties. Symbolic representation is enough.

If I like the answer I will give a like(thumbsup) for sure. Otherwise ready for dislike.

The creation of the US Interstate Highway System was the single action that most changed the face of America after the World War II.

T or F

Your firm has been asked to evaluate the "risk" of removing drums of acid from a waste lagoon that contains cyanide. The following data have been provided to you: Volume of air in which occupants live = 1 X 108 m3 Wind speed = calm Number of drums = 10 Volume of each drum = 0.02m3 Contents of drums: HCl at a concentration of 10% by mass Anticipated reaction : HCl + NaCN --> HCN(g) + NaCl RfC for HCN = C X 10 -3 mg . m-3 Assuming 100% of the HCl will react from HCN, estimate the hazard index and indicate whether or not the residents should be evacuated while the drums are being removed.

what are the consideration and the requirements of the environmental part that should be taken when designing a bridge over a river in regards to the feasibility study.

As I am required to write a feasibility study about the environmental when designing the bridge over a river connecting two residential areas.

What are the subjects (field and laboratory data) that would go as enclosure with the geotechnical report for assisting design purposes?

Find the required rectangular cross-sectional area for a tied reinforced concrete column which should support a load of 300 tons. Use 4000 psi concrete, ultimate steel stress of 60,000 psi and 4% steel.